Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

How to Configure an IPv6 DHCP Guard Policy
SUMMARY STEPS
1. configure terminal
2. interface range Interface_name
3. ipv6 dhcp guard [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none |
remove vlan_ids | all} ] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none | remove vlan_ids |
all} ]
4. do show running-config interfaceportchannel_interface_name
DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
Switch# configure terminal
Step 2
interface range Interface_name
Example:
Switch(config)#
Step 3 ipv6 dhcp guard [attach-policy policy_name [ vlan {vlan_ids
| add vlan_ids | except vlan_ids | none | remove vlan_ids |
all} ] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none
| remove vlan_ids | all} ]
Example:
Switch(config-if-range)# ipv6 dhcp guard
attach-policy example_policy
or
Switch(config-if-range)# ipv6 dhcp guard
attach-policy example_policy vlan 222,223,224
or
Switch(config-if-range)#ipv6 dhcp guard vlan 222,
223,224
Step 4
do show running-config interfaceportchannel_interface_name
Example:
Switch#(config-if-range)#
int po11

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

704
interface Po11
do show running-config
Purpose
Enters the global configuration mode.
Specify the port-channel interface name assigned when
the EtherChannel was created. Enters the interface range
configuration mode.
Enter the do show interfaces summary
Tip
command for quick reference to interface names
and types.
Attaches the DHCP Guard policy to the interface or the
specified VLANs on that interface. The default policy is
attached if the attach-policy option is not used.
Confirms that the policy is attached to the specified
interface without exiting the configuration mode.